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Add generator expressions to Scala for Python Devs #3181

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Add generator expressions to Scala for Python Devs #3181

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22 changes: 21 additions & 1 deletion _overviews/scala3-book/scala-for-python-devs.md
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Expand Up @@ -40,7 +40,7 @@ At a high level, Scala shares these *similarities* with Python:
- Both have a relatively simple, concise syntax
- Both support a [functional style of programming][fp-intro]
- Both are object-oriented programming (OOP) languages
- Both have comprehensions: Python has list comprehensions and Scala has `for` comprehensions
- Both have comprehensions: Python has list comprehensions, dict comprehensions and generator expressions and Scala has `for` comprehensions
- Both languages have support for lambdas and [higher-order functions][hofs]
- Both can be used with [Apache Spark](https://spark.apache.org) for big data processing
- Both have a wealth of terrific libraries
Expand Down Expand Up @@ -693,6 +693,26 @@ Scala also has `match` expressions.
</tbody>
</table>

### Lazily evaluated comprehensions:

<table>
<tbody>
<tr>
<td class="python-block">
<code>from itertools import count
<br>all_squares = (n**2 for n in count())&nbsp; # generator expression
<br># all_squares: &lt;generator object &lt;genexpr&gt; at ...&gt;</code>
</td>
</tr>
<tr>
<td class="scala-block">
<code>val allSquares = for n &lt;- LazyList.from(0) yield n * n
<br>// allSquares: LazyList(&lt;not computed&gt;)</code>
</td>
</tr>
</tbody>
</table>

### `match` expressions:

<table>
Expand Down